JP4732747B2 - Conical nozzle - Google Patents

Abstract

The conical nozzle has a nozzle component (10) with a swirl chamber (18), a feed bore (22) in one wall of the swirl chamber, and an outlet bore (20) in a first end wall of the swirl chamber. An axially symmetrical protrusion (30) or recess is provided on a second end wall of the swirl chamber, and at least two blind holes (32) are located in the first end wall adjacent to the outlet bore. An encompassing annular chamber in communication with the feed bore and nozzle component is provided in the region of the feed bore.

Description

  The present invention relates to a conical nozzle having a nozzle body having a swirl chamber, a supply hole disposed in a side wall of the swirl chamber, and an outflow hole disposed in a first front wall of the swirl chamber.

  From US Pat. No. 6,057,049, an all-conical nozzle having an axial connection end is known. This all-cone nozzle has a nozzle body provided with a swirl chamber, and a supply hole arranged in a tangential manner with respect to the swirl chamber wall communicates with the swirl chamber. An outflow hole is arranged in the first front wall of the swirl chamber, and the outflow hole has a cross section that starts from the swirl chamber and first narrows and then widens conically. A funnel-shaped bottom having a plurality of pockets is provided on the front wall of the nozzle chamber opposite to the outflow hole. These pockets form a profile arrangement that affects the rotational flow. The pockets are preferably arranged according to the pentagram format. The medium to be injected is supplied to the supply hole via the supply passage, which starts from the supply hole and first extends parallel to the circumferential surface of the swirl chamber and then bends at right angles in the subsequent transitions. After that, it further extends in the axial direction.

Patent Document 2 discloses an all-conical nozzle having an axial connection end, in which a swirl body having a plurality of blades or guide mechanisms is arranged inside a swirl chamber.
Another full-cone nozzle with an axial connection end is known from US Pat. There, two propeller-like swirling bodies are arranged inside the swirl chamber.

  From Patent Document 4, an all-cone nozzle having a side connection end is known. There, the supply conduit communicates directly with a supply hole arranged tangentially to the swirl chamber. There is only a slight direction change between the supply conduit and the supply hole. A plate having a plurality of openings for adjusting the spray shape is disposed at the bottom of the swirl chamber.

  Another full cone nozzle with a lateral connection end is known from US Pat. The supply conduit is aligned with the supply hole, which communicates tangentially into the circular cylindrical swirl chamber. The lid of the swirl chamber has a plurality of protrusions in order to adjust the peripheral speed of the flow in the nozzle.

  From Patent Document 6, a spray drying nozzle having a circular cylindrical swirl chamber is known, and a supply hole is opened in the peripheral wall of the swirl chamber. The outflow hole is disposed on the first front wall of the swirl chamber. The swirl chamber is surrounded by the annular chamber, and the medium to be sprayed is supplied to the supply hole through the annular chamber. The annular chamber is supplied via a shaft connection end.

German Patent Publication DE199489939C1 German Patent Publication DE2700028C2 European Patent Publication EP0350250 German Patent Publication DE2123519 German publication DE30244472A1 German Patent Publication DE 19753489C1

  An object of the present invention is to provide a conical nozzle that can be simply formed and is suitable for axial connection.

  According to the present invention, in a conical nozzle having a swirl chamber, a supply hole disposed in a side wall of the swirl chamber, and an outflow hole disposed in a first front wall of the swirl chamber, A rotationally symmetric protrusion or a rotationally symmetric recess is disposed on a second front wall opposite to the front wall of at least one, and at least two bag holes adjacent to the outflow hole in the first front wall; Is arranged.

  The rotationally symmetrical protrusions or rotationally symmetric recesses in the second front wall and the bag holes in the first front wall are formed in a relatively simple manner. Preferably, the first front wall is formed in a conical shape and narrows in the direction of the outflow hole. The invention provides a nozzle that is particularly effective and simple to form for generating a full cone beam. Preferably at least two bag holes having the same dimensions are provided, but three or four bag holes can also be provided.

  In the development of the present invention, an annular chamber is provided which is connected to the supply hole and surrounds the nozzle body in the region of the supply hole.

  In this way, a conical nozzle shaft connection according to the invention is possible. Thereby, the nozzle according to the invention has the advantage of a confined nozzle with little clogging with lateral connections. This is because it is not necessary to provide a built-in piece that supports clogging inside the swirl chamber. Nevertheless, the conical nozzle according to the present invention can be connected axially, thereby requiring a relatively small amount of built-in space. Thereby, the conical nozzle according to the invention is suitable for use in the secondary cooling of billet continuous casting equipment in a particularly preferred manner. In particular, the conical nozzle according to the invention is replaced with a conventional axial full cone nozzle using a simple adapter.

  In the development of the present invention, the protruding portion is formed in a circular cylindrical shape.

  Such a formation of the protrusion, for example as a rotating part, can be easily manufactured.

  The ratio of the size of the supply holes to the size of the outflow holes can be between 1: 1 and up to 1: 1.5 in the conical nozzle according to the invention. The ratio of the size of the supply hole to the swirl chamber diameter can be greater than 1: 1.5, and the ratio of the supply hole to the annular chamber of the supply section can be 1: x where x <1. .

  In the development of the present invention, at least two bag holes are formed in a circular cylindrical shape.

  In this way, a simple form of the conical nozzle according to the invention is obtained.

  In the development of the present invention, at least two pouch holes are shifted from each other in the region of the outflow holes.

  Thereby, in a simple manner, an outflow region communicating with the outflow hole is formed in the transition region of the bag hole. This type of shape is particularly effective in connection with a conical front wall that narrows in the direction of the open end of the outflow hole.

  In the development of the present invention, the central axis of the bag hole and the outflow hole are located in a common plane.

  In this manner, an 8-shaped notch is formed in the front wall, and the outflow opening is disposed at the center point. Thereby, an outflow region is formed that ensures the generation of a uniform spray image.

  In the development of the present invention, the respective peripheral walls of the at least two bag holes are aligned with the peripheral wall of the swirl chamber in the region of the cutting line, and the cut line passes through the respective bag hole and the central axis of the swirl chamber. Is defined by intersecting the peripheral wall of the swirl chamber and the peripheral wall of the respective bag hole.

  In this way, a favorable flow transition is achieved between the swirl chamber wall and the bag hole wall.

  The problem underlying the invention is also solved by a conical nozzle having a nozzle body with a swirl chamber, a supply hole arranged in the side wall of the swirl chamber and an outflow hole arranged in the first front wall of the swirl chamber. In the conical nozzle, a protruding portion that narrows in the direction of the outflow hole in a conical shape is disposed on the second front wall of the swirling chamber opposite to the first front wall, and the protruding portion is At least a portion of the surface has at least one flow guide surface extending around the conical protrusion and extending in the direction of the narrowing end.

  As the flow guide surface, a groove or a protrusion can be arranged on the protruding portion that becomes narrower. A conical nozzle according to the invention can have a circular cylindrical swirl chamber with rotational symmetry, in particular with a flat front wall, so that it can be easily formed at least in the swirl chamber region. The preferable peripheral speed of the flow in the swirl chamber is adjusted by the thinning protrusion provided on the second front wall.

  In the development of the present invention, an annular chamber is provided which is connected to the supply hole and surrounds the nozzle body in the region of the supply hole.

  In this way, the conical nozzle according to the invention can be used for axial connection.

  In the development of the present invention, the flow guide surface is formed as a groove inclined around the central longitudinal axis of the conical protrusion, which is looped around the conical protrusion.

  With this kind of circular groove, it is possible to adjust the rotational flow speed in the swirl chamber and thereby to adjust the spray image of the conical nozzle according to the invention.

  The problem underlying the invention is also solved by a conical nozzle having a nozzle body with a swirl chamber, a supply hole arranged in the side wall of the swirl chamber and an outflow hole arranged in the first front wall of the swirl chamber. In the conical nozzle, the outflow hole starts from the swirl chamber and widens in a conical shape.

  This type of conical nozzle is particularly difficult to feel dirty. This is because the outflow holes start from the swirl chamber and widen, so that the swirl chamber itself does not clog. The swirl chamber can be formed in a circular cylindrical shape, for example.

  In the development of the present invention, an annular chamber that is connected to the supply hole and surrounds the nozzle body in the region of the supply hole is provided.

  In this way, the conical nozzle according to the invention is suitable for axial connection.

  In the development of the present invention, the nozzle body is integrally formed.

  Since the outflow hole starts from the swirl chamber and widens in a conical shape, the conical nozzle according to the present invention does not have an undercut between the outflow hole and the swirl chamber, thereby providing an integral component It can be formed at low cost.

  Other features and advantages of the invention will become apparent from the claims and the following description of the preferred embodiment of the invention in connection with the drawings.

  The cross-sectional view of FIG. 1 shows an all-conical nozzle having a shaft connection end with a nozzle body 10 and a connection piece 12 that partially surrounds the nozzle body 10. The nozzle body 10 is composed of two parts, and has a nozzle mouth piece 14 and a swirl chamber lid 16. A swirl chamber 18 is provided in the nozzle mouth piece 14, and an outflow hole 20 is formed in the first front wall of the swirl chamber 18. A second front wall of the swirl chamber 18 opposite to the first front wall is formed by the swirl chamber lid 16. The swirl chamber 18 is formed in a circular cylindrical shape, and the supply hole 22 communicates with the swirl chamber 18 in the region of the side wall of the swirl chamber 18. The supply hole 22 is not visible per se in the representation of FIG. 1 and is therefore simply indicated by a broken line.

  The nozzle mouth piece 14 has a ring flange that makes a round around the front end in the region of the outflow hole 20, and a region having a reduced outer diameter and an external screw 24 is continuous on the ring flange. is doing. A region having a further reduced diameter is connected to the region having the external screw 24, and the supply hole 22 is disposed therein. Therefore, as a whole, the nozzle mouth piece 14 is formed with a step, the nozzle mouth piece 14 is screwed into the front end portion of the connection piece 12 by the external screw 24, and the ring flange of the nozzle mouth piece 14 is connected to the connection piece. 12 is attached to the end face, thereby determining the installation position of the nozzle mouth piece 12. The connecting piece 12 has an axial hole 26 starting from its front end, which has an internal thread in the front area, which internal thread is the external thread of the nozzle mouth piece 14. 24 is engaged.

  The inner diameter of the shaft hole 26 is larger than the outer diameter of the region of the nozzle mouth piece 14 where the supply hole 22 is disposed. The inner diameter of the shaft hole 26 is also larger than the outer diameter of the swirl chamber lid 16. Thereby, an annular chamber is formed in the region of the supply hole 22 between the nozzle mouth piece 14 and the connection piece 12. The annular chamber starts from the supply hole 22 and continues to the rear end of the swirl chamber lid 16. In the transition to the rear end of the shaft hole 26 opposite to the outflow hole 20, the shaft hole first narrows in a conical shape and then moves to a connecting portion having an internal thread. Accordingly, the connecting piece 12 can be screwed in the axial direction onto the pipe pipe, and only a small amount of installation space is required in the radial direction. Nevertheless, as is apparent from FIG. 1, the conical nozzle according to the present invention does not require a swivel insert that is prone to clogging as provided in a conventional full-shaft conical nozzle. Thereby, the free cross section of the conical nozzle according to the invention is about 50% to 50% greater than the free cross section of the conventional axial full cone nozzle. Therefore, the conical nozzle according to the present invention is much less clogged than the conventional axial full cone nozzle. Compared to a conventional full conical nozzle with tangential connecting ends, the conical nozzle according to the invention requires a much smaller installation space.

  A satisfactory splay image including the desired velocity distribution within the entire cone generated from the nozzle according to the present invention is, in part, through the ratio of the size of the supply hole 22 to the size of the outflow hole 20. Adjusted, it can range from 1: 1 to a maximum of 1: 1.5. Furthermore, the ratio of the feed hole to the swirl chamber diameter is noted, which can be greater than about 1: 1.5, for example. The size of the supply hole relative to the size of the annular gap between the connecting piece 12 and the nozzle body 14 can be 1: 1, but the annular gap can also be formed larger than the supply hole. Furthermore, the arrangement of the supply holes 22 with respect to the central axis 28 of the swirl chamber 18 is important and will be further described later. In order to adjust the peripheral speed of the medium to be sprayed in the swirl chamber 18, the swirl chamber lid 16 is further formed in the shape of the second front wall of the swirl chamber 18, and the swirl continuous with the outflow hole 20. The shape of the first front wall of the chamber 18 is used. The swirl chamber lid 16 has a circular cylindrical protrusion 30 on the side facing the swirl chamber 18, and the protrusion is disposed concentrically with respect to the central axis 28. The first front wall of the swirl chamber 18 that has transitioned to the outflow hole 20, on the other hand, has a conical shape and is formed to narrow toward the outflow opening 20, and further, the first front wall. Are formed with two bag holes 32, which will be described in more detail later.

  The perspective view of FIG. 2 shows the swirl chamber lid 16 of FIG. The swirl chamber lid 16 is provided with a circular cylindrical protrusion 30 extending from the flat front wall 34. Starting from the protrusion 30, the end surface 34 is continuous with a circular cylindrical portion having an external screw 36. The swirl chamber lid 16 is screwed into the rear end of the nozzle mouth piece 14 opposite to the outflow hole 20 by the external screw 36. Following the external thread 36, a ring-shaped seal flange 38 is provided, which is followed by an outer peripheral region 40 formed in the form of a six-ridge surface.

  The side view of FIG. 3 shows another swirl chamber lid 42. The swirl chamber lid 42 is distinguished from the swirl chamber lid 18 by the shape of the end surface 44 facing the swirl chamber 18, and the end surface forms a second front wall on the opposite side of the swirl chamber 18 from the outflow hole 20. To do. The end surface 44 is curved outward and protrudes into the swirl chamber 18 when assembled.

  In the cross-sectional view of FIG. 4, yet another shape 46 of the swirl chamber lid is shown. The swirl chamber lid 46 is distinguished from the swirl chamber lid 16 only by the shape of the end surface 48 facing the swirl chamber 18 in the assembled state. Since the end surface 48 is curved inward, a recess is formed in the swirl chamber lid 46 by the end surface 48. Accordingly, in the assembled state, the recess widens the swirl chamber 18 in a direction away from the outflow hole 20.

  The perspective view of FIG. 5 shows the nozzle mouth piece 14 of FIG. 1 from obliquely behind. As is apparent from the figure, the supply hole 22 is arranged off the center, so that the medium to be sprayed passes through the supply hole 22 to form a circumferential flow in the swirl chamber 18. It is introduced in. As is further apparent from the figure, the peripheral surface of the first region located on the outflow hole 20 side of the nozzle mouth piece 14 can screw the nozzle mouth piece 14 into the connection piece 12 shown in FIG. In order to be able to do so, it is multifaceted and is formed according to the type of hex nut.

  The top view of FIG. 6 shows the nozzle mouthpiece 14 of FIG. 1, and the members that cannot be seen in the display of FIG. 6 are shown only by broken lines. This is, for example, the supply hole 22, which is indicated by a broken line, and its eccentric position with respect to the swirl chamber 18 can be well understood. The supply hole 22 communicates so that the flow is eccentric into the swirl chamber 18 but is not introduced tangentially into the swirl chamber 18. As can be well understood in the display of FIG. 6, two bag holes 32 are arranged adjacent to the outflow hole 20 in the first front wall. The two bag holes 32 are formed in a circular cylindrical shape, have the same dimensions, and the central axis thereof and the central axis of the outflow opening 20 are located in a common plane. Each of the bag holes 32 has a diameter larger than the half inner diameter of the swirl chamber 18. The bag hole 32, on the one hand, continues to the inner peripheral wall of the swirl chamber 18 and overlaps in the region of the outflow hole 20. As a whole, the two bag holes 32 form an eight-shaped notch in the first front wall of the swirl chamber 18, and the outflow hole 20 is formed of the two bag holes 32. Located at the center point. The two bag holes 32 are used to adjust the peripheral speed of the flow in the swirl chamber 18 and to form an exclusion region around the outflow hole 20.

  The cross-sectional view of FIG. 7 along the line XX of FIG. 6 shows the arrangement of the bag holes with respect to the bag holes 32 and the outflow holes 20.

  Further, it can be seen from the figure that the first front wall 50 of the swirl chamber 18 is formed in a conical shape and narrows in the direction of the outflow hole 20.

  A cutout 52 having a triangular cross section is formed around the outflow hole 20 on the end face of the nozzle mouth piece 14 opposite to the swirl chamber 18.

  Also in the cross-sectional view along the YY line in FIG. 8, the conical shape of the first front wall of the swirl chamber 18 can be seen. It is further understood from the figure that the peripheral walls of the two bag holes 32 are aligned with the peripheral wall of the swirl chamber 18 in the cutting plane yy of FIG. Accordingly, in the cutting plane of FIG. 8, which is determined by cutting the peripheral wall of the swirl chamber 18 by the plane on which the central axes of the two bag holes 32 and the outflow hole 20 are located, the respective peripheral walls and swirl chamber of the bag hole 32 are defined. Since the 18 peripheral walls are aligned, a straight line connected in the display of FIG. 8 is obtained.

  The cross-sectional view of FIG. 9 shows another preferred embodiment of a conical nozzle according to the present invention for generating a full conical spray image, in which only the nozzle mouth piece 54 is shown in the display of FIG. Yes. The nozzle mouth piece 54 is provided for incorporation into a connection piece corresponding to the connection piece 12 of FIG. In the nozzle mouth piece 54, the swirl chamber 56 formed in a circular cylindrical shape is transferred to the outflow hole 58 without the cross section being narrowed. In that case, starting from the swirl chamber 58, the outflow hole 58 is widened in a conical shape, and the first conical region 60 having a first conical angle with respect to the peripheral wall of the swirl chamber 58 and the first region 60. A continuous second conical region 62 is provided, and the second conical region 62 has a larger angle with respect to the peripheral wall of the swirl chamber 58. Therefore, the outflow hole 58 starts from the swirl chamber 58 and is widened stepwise by the conical regions 60 and 62. The supply hole 64 is opened in the peripheral wall of the swirl chamber 58, and the supply hole is disposed at the center with respect to the swirl chamber 58, so that the supply hole 64 and the central axis of the swirl chamber 56 intersect. The second front wall of the swirl chamber 56 on the side opposite to the outflow hole 58 is formed flat. Thereby, the nozzle mouth piece 54 as a whole has a very simple application shape, and the application shape is very difficult to clog. The essential advantage of the nozzle mouthpiece 54 is that it can be integrally formed. The nozzle mouth piece 54 can be screwed into the connection piece shown in FIG.

  The side view of FIG. 10 shows a swirl chamber lid 66 provided for insertion into the nozzle mouth piece 68, which nozzle mouth piece is shown in section in FIG. The swirl chamber lid 66 has a conical protrusion 72 on the end face of the nozzle mouth piece 68 facing the swirl chamber 70, and the protrusion rounds a part of the peripheral surface in parallel with each other. Two grooves 74 and 76 are provided. The extending direction of the grooves 74 and 76 is inclined with respect to the central axis 78 of the swirl chamber lid 66. The conical protrusions 72 with grooves 74, 76 provide for adjusting the peripheral speed in the swirl chamber 70 to such an extent that a desired spray image is possible.

  As is clear from the cross-sectional view of FIG. 11, the supply hole 80 opens eccentrically into the swirl chamber 70, so that a rotating flow is generated in the swirl chamber 70, and its peripheral speed is the protrusion of the swirl chamber lid 66. Controlled by part 72.

  The nozzle mouth piece 68 is provided for an axial conical nozzle and is screwed into a connection piece corresponding to the connection piece 12 shown in FIG.

1 shows a partial cross section of a conical nozzle according to the invention according to a first embodiment. FIG. 2 is a perspective view showing a swirl chamber lid for the conical nozzle of FIG. 1. FIG. 6 is a side view showing another swirl chamber lid for the conical nozzle of FIG. 1. FIG. 6 is a cross-sectional view showing yet another swirl chamber lid for the conical nozzle of FIG. 1. It is a perspective view which shows the nozzle mouth piece of the conical nozzle of FIG. It is a top view which shows the nozzle mouth piece of FIG. It is sectional drawing along the XX line of FIG. It is sectional drawing along the YY line of FIG. It is sectional drawing which shows other embodiment of the conical nozzle based on this invention. Fig. 6 shows yet another embodiment of a conical nozzle according to the present invention. It is sectional drawing which shows the nozzle mouth piece for using with the turning chamber lid | cover of FIG.

Explanation of symbols

10, 54 Nozzle body 18, 56 Swivel chamber 20, 58 Outflow hole 22, 64, 80 Supply hole 30, 72 Protruding portion 32 Bag hole 48 Recess 70 Annular chamber 74 Groove

Claims (7)

A cone having a nozzle body (10) with a swirl chamber (18), a supply hole (22) disposed in a side wall of the swirl chamber and an outflow hole (20) disposed in a first front wall of the swirl chamber. In the nozzle,
The second front wall of the swirl chamber opposite to the first front wall is provided with a rotationally symmetric protrusion (30) or a rotationally symmetric recess (48), and in the first front wall. A conical nozzle characterized in that at least two bag holes (32) are arranged adjacent to the outflow hole. 2. The conical nozzle according to claim 1, wherein an annular chamber is provided which is connected to the supply hole (22) and surrounds the nozzle body (10) in the region of the supply hole.   The conical nozzle according to claim 1 or 2, wherein the protrusion (30) is formed in a circular cylindrical shape.   The conical nozzle according to any one of claims 1 to 3, characterized in that at least two bladder holes (32) are formed in a circular cylindrical shape.   5. A conical nozzle according to any one of the preceding claims, characterized in that at least two bladder holes (32) migrate to each other in the region of the outflow hole (20).   The conical nozzle according to claim 5, characterized in that the central axes of the bag hole (32) and the outflow hole (20) are located in a common plane.   A cutting line (Y-Y) defined by each peripheral wall of at least two bag holes (32) defined by a plane passing through the central axis of each bag hole and the swirl chamber intersecting the swirl chamber and the peripheral wall of each bag hole The conical nozzle according to any one of claims 1 to 6, characterized in that it is aligned with the peripheral wall of the swirl chamber (18) in this area.

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